An extreme weather year, but few measures to find out why

By JUSTIN GILLIS, NEW YORK TIMES

December 24, 2011

At the end of one of the most bizarre weather years in U.S. history, climate research stands at a crossroads.

Scientists say they could, in theory, do a much better job of answering the question "Did global warming have anything to do with it?" after extreme weather events like the drought in Texas and the floods in New England.

But for many reasons, efforts to put out prompt reports on the causes of extreme weather are essentially languishing. Chief among the difficulties that scientists face: The political environment for new climate-science initiatives has turned hostile, and with the federal budget crisis, money is tight.

And so, as the weather becomes more erratic by the year, the public is left to wonder what is going on.

When 2010 ended, it had seemed as if people had lived through a startling year of weather extremes. But in the United States, if not elsewhere, 2011 has surpassed that.

A typical year in this country features three or four weather disasters whose costs exceed $1 billion each. But this year, the National Oceanic and Atmospheric Administration has tallied a dozen such events, including wildfires in the Southwest, floods in multiple regions of the country and a deadly spring tornado season. And the agency has not finished counting. The final costs are certain to exceed $50 billion.

A major question nowadays is whether the frequency of particular weather extremes is being affected by human-induced climate change.

Translator

To read this article in one of Houston's most-spoken languages, click on the button below.

Climate science already offers some insight. Researchers have proved that the temperature of the Earth's surface is rising, and they are virtually certain that the human release of greenhouse gases, mainly from the burning of fossil fuels, is the major reason. For decades, they have predicted that this would lead to changes in the frequency of extreme weather events, and statistics show that has begun to happen.

For instance, scientists have long expected that a warming atmosphere would result in fewer extremes of low temperature and more extremes of high temperature. In fact, research shows that about two record highs are being set in the U.S. for every record low, and similar trends can be detected in other parts of the world.

Likewise, a well-understood physical law suggests that a warming atmosphere should hold more moisture. Scientists have directly measured the moisture in the air and confirmed that it is rising, supplying the fuel for heavier rains, snowfalls and other types of storms.

Some questions can be answered with focused studies of a specific weather event, but these are often finished years afterward. Lately, scientists have been discussing whether they can do a better job of analyzing events within days or weeks, not years.

But doing this on a regular basis would probably require new personnel spread across several research teams, along with a strong push by the federal government, which tends to be the major source of financing for research. Yet Washington is essentially frozen on the subject of climate change.